Telemecanique Altivar 56 manual - Northern Industrial

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Bulletin No. 50006-519-01BDecember 1996Chapter 1 — Receiving and InstallationMounting in General Purpose Metal EnclosureSide view shown.ATV56U41N4 to D23N4and U41M2 to D16M2ATV56D33N4 to D79N4and D23M2 to D46M2Figure 6: Ventilation for ATV56U41N4 to D79N4 and ATV56U41M2 to D46M2Table 6:Flow Rates for ALTIVAR 56 Drive Controller FansDrive ControllerFan Flow Rate [1]CFM dm 3 /sATV56U41N4, ATV56U54N4 10 5ATV56U72N4, ATV56U41M2 20 10ATV56U90N4, ATV56D12N4, ATV56U72M2, ATV56U90M2 44 22ATV56D16N4, ATV56D23N4, ATV56D12M2, ATV56D16M2 94 47ATV56D33N4, ATV56D46N4, ATV56D54N4, ATV56D64N4,ATV56D79N4, ATV56D23M2, ATV56D33M2, ATV56D46M2200 100[1] Free air flow rates.For ATV56D16N4 to D79N4 and ATV56D12M2 to D46M2 drive controllers, theyellow pre-alarm LED flashes when the drive controller approaches the thermallimit. When the drive controller is running at rated load, this pre-alarm is issued atleast one minute before the thermal limit is reached.Thermal protection of all drive controllers is ensured by a thermal sensor attachedto the heat sink. When the sensor opens:• Drive controller trips, the fault LED is illuminated and a fault message appearson the keypad display.• Ventilation system continues operating if control supply is maintained,enabling the drive controller to be rapidly cooled down.© 1996 Square D All Rights Reserved11ηττπ://νιχοντρολσ.χοm
Chapter 1 — Receiving and InstallationBulletin No. 50006-519-01BMounting in Type 12 (IP54) Metal Enclosure December 1996MOUNTING INTYPE 12 (IP54)METAL ENCLOSURECalculating Non-VentilatedEnclosure SizeThe ALTIVAR 56 drive controller is a Type 1/IP30 enclosed product, howevercertain applications may require Type 12 or IP54 protection. The following kits areavailable:• Recess mounting kits for mounting drive controller with the heat sink outsidethe enclosure. There are two types available (see page 13).Below is the equation for calculating Rth (°C/W), the maximum allowable thermalresistance of the enclosure:RthT i = Max. internal ambient temp. ( ° C) around drive controllerT i – T o= ---------------- T o = Max. external ambient temp. ( °C) around enclosurePP = Total power dissipated in enclosure (W)For the power dissipated by the drive controllers at rated load, see Tables 1through 4 on pages 3-4.Useful heat exchange surface area, S (in 2 ), of a wall-mounted enclosure generallyconsists of the sides, top and front. The minimum surface area required for a drivecontroller enclosure is calculated as follows:SK= --------RthRth = Thermal resistance of the enclosure (calculated previously)K = 300 for painted metalThe following points should be considered when sizing the enclosure:• Use only metallic enclosures, since they have good thermal conduction.• This procedure does not consider radiant or convected heat load from externalsources. Do not install enclosures where external heat sources (such as directsunlight) can add to enclosure heat load.• If additional devices are present inside the enclosure, the heat load of thedevices must be considered in the calculation.• The actual useful area for convection cooling of the enclosure will varydepending upon the method of mounting. The method of mounting mustallow for free air movement over all surfaces considered for convectioncooling.Below is a sample calculation of the enclosure size for an ATV56U72N4 (5 hp) drivecontroller mounted in a Type 12 enclosure.• Maximum external temperature: T o = 25 °C• Power dissipated inside enclosure: P = 165 W• Maximum internal temperature: T i = 40 °C• Area resistivity for painted metal: K = 300• Calculate maximum allowable thermal resistance, Rth:40 ° C–25 ° CRth = ----------------------------------- = 0.091 ° C/W165 W• Calculate minimum useful heat exchange surface area, S:300S = ---------------- = 3300 in 20.09112 © 1996 Square D All Rights Reservedηττπ://νιχοντρολσ.χοm
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Telemecanique Altivar 56 manual - Northern Industrial

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